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Finding the Fourth Proportional to 109,676.40, 164,514.60 and 79,738.80

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Solution

The fourth proportional to 109,676.40, 164,514.60 and 79,738.80 is: 119,608.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,676.40 : 164,514.60 = 79,738.80 : x
  2. Step 2: Convert to fraction form
    109,676.40/164,514.60 = 79,738.80/x
  3. Step 3: Cross multiply
    109,676.40x = 164,514.60 × 79,738.80
  4. Step 4: Simplify right side
    109,676.40x = 13,118,196,786.48
  5. Step 5: Solve for x
    x = 13,118,196,786.48/109,676.40
  6. Step 6: Final answer
    x = 119,608.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.